Formula

The Child Status Protection Act (CSPA) is a U.S. law that helps protect the status of children who are seeking to get a green card. It does this by freezing the age of children at the time their parents begin the process of applying for a green card, so that they do not "age out" when they reach their 21st birthday.

The CSPA formula for calculating the age of a child is as follows:

Age = Age in months on the date the parent's green card application is filed - (Number of days the application was pending before it was approved / 365)

For example, let's say a child is 20 years and 6 months old on the date their parent files a green card application. If the application takes 12 months to be approved, the CSPA formula would be used to calculate the child's age as follows:

Age = 20 years and 6 months - (12 months / 365 days per month) = 20 years and 3 months

This means that the child's age would be frozen at 20 years and 3 months, and they would not "age out" when they reach their 21st birthday.

It's important to note that the CSPA formula is only used to calculate the age of children who are seeking to get a green card through their parents. It is not used for children who are seeking a green card through other means, such as marriage or employment.